大约有 47,000 项符合查询结果(耗时:0.0292秒) [XML]

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How to get all selected values from ?

... The usual way: var values = $('#select-meal-type').val(); From the docs: In the case of <select multiple="multiple"> elements, the .val() method returns an array containing each selected option; ...
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Difference between Select Unique and Select Distinct

... SELECT UNIQUE is old syntax supported by Oracle's flavor of SQL. It is synonymous with SELECT DISTINCT. Use SELECT DISTINCT because this is standard SQL, and SELECT UNIQUE is non-standard, and in database brands other than ...
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Postgres: INSERT if does not exist already

...onditional INSERT in PostgreSQL: INSERT INTO example_table (id, name) SELECT 1, 'John' WHERE NOT EXISTS ( SELECT id FROM example_table WHERE id = 1 ); CAVEAT This approach is not 100% reliable for concurrent write operations, though. There is a very tiny race condition between...
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Is there Selected Tab Changed Event in the standard WPF Tab Control

...WPF, is there an event that can be used to determine when a TabControl 's selected tab changes? 9 Answers ...
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How to select option in drop down protractorjs e2e tests

I am trying to select an option from a drop down for the angular e2e tests using protractor. 31 Answers ...
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How to select an option from drop down using Selenium WebDriver C#?

I was trying for my web test selecting an option. An example can be found here: http://www.tizag.com/phpT/examples/formex.php ...
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How to select the first element in the dropdown using jquery?

I want to know how to select the first option in all select tags on my page using jquery. 9 Answers ...
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How do you remove all the options of a select box and then add one option and select it with jQuery?

Using core jQuery, how do you remove all the options of a select box, then add one option and select it? 24 Answers ...
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How to get first and last day of previous month (with timestamp) in SQL Server

... select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0) --First day of previous month select DATEADD(MONTH, DATEDIFF(MONTH, -1, GETDATE())-1, -1) --Last Day of previous month ...
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SQL MAX of multiple columns?

... Well, you can use the CASE statement: SELECT CASE WHEN Date1 >= Date2 AND Date1 >= Date3 THEN Date1 WHEN Date2 >= Date1 AND Date2 >= Date3 THEN Date2 WHEN Date3 >= Date1 AND Date3 >= Date2 THEN Date3 ELSE ...